The new fifth-generation iPod touch is the thinnest, most advanced iPod touch yet, boasting a 4-inch display, an A5 chip and an incredibly small form factor, but it’s not an upgrade in every way from the models that preceded it.

In fact, in one key way, it’s a serious downgrade from previous iPod touches: the new iPo touch no longer has an ambient light sensor, meaning that it can’t adjust screen brightness depending upon the brightness in the room around you. That could mean you’ll spend a lot more time manually juggling brightness in the new iPod touch.